let a=1;
let b=2;
let c=3;
/([0,0](#0)=>[0,0]) | ([0,4](#0)=>[0,4]) | ([0,6](#0)=>[0,6]) 
| ([0,0](#0)=>[0,7]) | ([1,4](#0)=>[0,8]) | 
([1,6](#0)=>[0,10]) | ([0,0](#0)=>[0,11]) | ([2,4](#0)=>[0,12]) | ([2,6](#0)=>[0,14])